package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Service;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.itheima.constant.MessageConstant;
import com.itheima.dao.PermissionDao;
import com.itheima.dao.RoleDao;
import com.itheima.dao.UserDao;
import com.itheima.entity.PageResult;
import com.itheima.entity.QueryPageBean;
import com.itheima.entity.Result;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import com.itheima.utils.DateUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.transaction.annotation.Transactional;

import java.util.*;

/**
 * 用户服务
 */
@Service(interfaceClass = UserService.class)
@Transactional
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDao userDao;
    @Autowired
    private RoleDao roleDao;
    @Autowired
    private PermissionDao permissionDao;

    //根据用户名查询用户信息,包括用户的角色和角色关联的权限
    public User findByUsername(String username) {
        User user = userDao.findByUsername(username);//根据用户名查询用户表
        if (user == null) {
            return null;
        }
        Integer userId = user.getId();
        //根据用户id查询关联的角色
        Set<Role> roles = roleDao.findByUserId(userId);
        if (roles != null && roles.size() > 0) {
            //遍历角色集合，查询每个角色关联的权限
            for (Role role : roles) {
                Integer roleId = role.getId();//角色id
                //根据角色id查询关联的权限
                Set<Permission> permissions = permissionDao.findByRoleId(roleId);
                if (permissions != null && permissions.size() > 0) {
                    //角色关联权限集合
                    role.setPermissions(permissions);
                }
            }
            //用户关联角色集合
            user.setRoles(roles);
        }

        return user;
    }


    @Override
    public PageResult findPage(QueryPageBean pageBean) throws Exception {
        Integer currentPage = pageBean.getCurrentPage();
        Integer pageSize = pageBean.getPageSize();
        String queryString = pageBean.getQueryString();
        //使用分页助手
        PageHelper.startPage(currentPage, pageSize);

        List<User> list = userDao.findByCondition(queryString);
        PageInfo<User> pageInfo = new PageInfo<>(list);
        List<User> list1 = pageInfo.getList();
        long total = pageInfo.getTotal();
        PageResult pageResult = new PageResult(total, list1);
        return pageResult;
    }

    @Override
    public void add(User user, Integer[] roleIds) {
        String password = user.getPassword();
        BCryptPasswordEncoder bCryptPasswordEncoder = new BCryptPasswordEncoder();
        user.setPassword(bCryptPasswordEncoder.encode(password));
        userDao.add(user);
        Integer userId = user.getId();
        this.setUserAndRole(userId, roleIds);
    }


    //设置检查组和检查项多对多关系
    public void setUserAndRole(Integer userId, Integer[] roleIds) {
        //设置多对多关系
        if (roleIds != null && roleIds.length > 0) {
            for (Integer roleId : roleIds) {//检查项id
                Map<String, Integer> map = new HashMap<>();
                map.put("userId", userId);
                map.put("roleId", roleId);
                userDao.setUserAndRole(map);
            }
        }
    }

    @Override
    public User findById(Integer id) {
        return userDao.findById(id);
    }

    @Override
    public void edit(User user, Integer[] roleIds) {

        userDao.update(user);


        userDao.deleteAssioncation(user.getId());
        this.setUserAndRole(user.getId(), roleIds);

    }

    @Override
    public Result delete(Integer id) {

        long count = userDao.selectCountByUserId(id);
        if (count ==0) {
            //可以删除
            userDao.deleteById(id);
            return new Result(true,"删除成功");
        }
        return new Result(false,"删除失败");
    }
}
